JEE Main 2026 — Mechanical Properties of Fluids Question with Solution
JEE Main 2026 (24 January Shift 1)
Question
Sixty four rain drops of radius 1 mm each falling down with a terminal velocity of coalesce to form a bigger drop. The terminal velocity of bigger drop is .
Enter your answer
Show full solutionCorrect answer: 160
Correct answer
160
Step-by-step explanation
At terminal velocity, gravitational force equals Stokes drag:
For a sphere with mass , this gives
Therefore,
When 64 drops coalesce: , so
New terminal velocity:
cm/s
For a sphere with mass , this gives
Therefore,
When 64 drops coalesce: , so
New terminal velocity:
cm/s
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Mechanical Properties of Fluids chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2026, covering the Mechanical Properties of Fluids chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.